package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    /**
     * 添加购物车
     *
     * @param shoppingCartDTO
     */
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void addShopping(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        //判断添加的是否存在
        if (list != null && !list.isEmpty()) {
            //如果存在，直接+1
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() + 1);
            shoppingCartMapper.updataMember(cart);
        } else {
            //如果不存在，加入
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                //如果dishId不为空，则添加的是菜品
                //将菜品名称等信息查询出来
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
                //如果为空，则添加的是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            //插入数据
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> list(Long id) {
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(id);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void deleteById(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        //判断添加的是否存在
        if (list != null && !list.isEmpty()) {
            //如果存在，直接+1
            ShoppingCart cart = list.get(0);
            if (cart.getNumber() == 1){
                shoppingCartMapper.deleteById(shoppingCart);
            }else {
                cart.setNumber(cart.getNumber() - 1);
                shoppingCartMapper.updataMember(cart);
            }
        }else {
            shoppingCartMapper.deleteById(shoppingCart);
        }
    }

    @Override
    public void cleanShoppingCart() {
        Long id = BaseContext.getCurrentId();
        shoppingCartMapper.cleanShoppingCart(id);
    }
}
